A:
Positive:
1 x 2110412317 x 124141953 x 39819159 x 357697397 x 53159901 x 234231003 x 210413127 x 6749
Negative:
-1 x -21104123-17 x -1241419-53 x -398191-59 x -357697-397 x -53159-901 x -23423-1003 x -21041-3127 x -6749
Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 21,104,123, it is easier to work with a table - it's called factoring from the outside in.
We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.
| 1 | 21,104,123 | |
| -1 | -21,104,123 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,104,123.
Example:
1 x 21,104,123 = 21,104,123
and
-1 x -21,104,123 = 21,104,123
Notice both answers equal 21,104,123
With that explanation out of the way, let's continue. Next, we take the number 21,104,123 and divide it by 2:
21,104,123 ÷ 2 = 10,552,061.5
If the quotient is a whole number, then 2 and 10,552,061.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 21,104,123 | |
| -1 | -21,104,123 |
Now, we try dividing 21,104,123 by 3:
21,104,123 ÷ 3 = 7,034,707.6667
If the quotient is a whole number, then 3 and 7,034,707.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 21,104,123 | |
| -1 | -21,104,123 |
Let's try dividing by 4:
21,104,123 ÷ 4 = 5,276,030.75
If the quotient is a whole number, then 4 and 5,276,030.75 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.
Here is what our table should look like at this step:
| 1 | 21,104,123 | |
| -1 | 21,104,123 |
If you did it right, you will end up with this table:
| 1 | 17 | 53 | 59 | 397 | 901 | 1,003 | 3,127 | 6,749 | 21,041 | 23,423 | 53,159 | 357,697 | 398,191 | 1,241,419 | 21,104,123 |
| -1 | -17 | -53 | -59 | -397 | -901 | -1,003 | -3,127 | -6,749 | -21,041 | -23,423 | -53,159 | -357,697 | -398,191 | -1,241,419 | -21,104,123 |
Here are some more numbers to try:
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